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In DC motor is the armature plus brushes resistance substantially the same for every rotational position of the armature why?
In a DC motor, the armature resistance and brush contact resistance remain relatively constant across different rotational positions because these components are primarily resistive and do not change with position. The brushes continuously maintain contact with the commutator segments as the armature rotates, ensuring a consistent electrical path. While the inductance and back EMF may vary with position, the resistance itself is a fixed characteristic determined by the materials and design of the armature and brushes. Therefore, the overall resistance remains substantially the same throughout the armature's rotation.
Is every resistance load resistance?
No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.
Does the alternating current supplied to the armature winding of a DC motor gets converted to dc by a commutator before it flows through the armature coil of the DC motor?
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
Do batteries have resistance?
Yes they do have a resistance. Even though a battery is a voltage source it has some thevenin resistance. Every lead plate and cell of sulfuric acid, will have a small resistance. The thevenin resistance is equivalent or sum of all those resistances.
What part of motor makes the current in the coil reverse every half turn so that motor spins continuously?
The direction of the current flowing through it must be changed after every half rotation. Otherwise, when the north pole of the coil comes near the south pole of the magnet, there will be attraction between them and the coil will stop rotating.
In DC motor is the armature plus brushes resistance substantially the same for every rotational position of the armature?
yes
In DC motor is the armature plus brushes resistance substantially the same for every rotational position of the armature why?
In a DC motor, the armature resistance and brush contact resistance remain relatively constant across different rotational positions because these components are primarily resistive and do not change with position. The brushes continuously maintain contact with the commutator segments as the armature rotates, ensuring a consistent electrical path. While the inductance and back EMF may vary with position, the resistance itself is a fixed characteristic determined by the materials and design of the armature and brushes. Therefore, the overall resistance remains substantially the same throughout the armature's rotation.
Why does a armature motor spin continuously?
It does because it changes every half turn.
Does a circle have rotational symmetry?
Yes, a circle has infinite rotational symmetry. This means that no matter how much you rotate a circle about its center, it will look the same at every angle.
What is the suns rotational period?
25 days
Does every shape have rotational symmetry of order 1?
Yes but it's not normally included
Is every resistance load resistance?
No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.
Does the alternating current supplied to the armature winding of a DC motor gets converted to dc by a commutator before it flows through the armature coil of the DC motor?
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
What is the earths rotational period?
The earth rotates 360 degrees every 23 hours, 56 minutes and 4.100352 seconds.
What is the rotational speed of sun?
The Sun is not solid; it is a ball of highly compressed plasma, which behaves like a little like a liquid. The polar areas of the Sun rotate in about 33 days, while the equatorial areas spin more quickly, in about 28 days.
Who was the last person eaten by cannibal?
This happens some where every single year. So to say "The Last" would be substantially incorrect.
Was there any resistance to Nazis and their treatment of the Jews?
Yes, there was resistance at every level, However what people could actually do was limited.
